Stop device for movable parts on rotary reprinting machines



Aug. 8, 1939. w. QRITZERFELD STOP DEVICE FOR MOVABLE PARTS ON ROTARY REPRiNfIING MACHINES Filed Aug. 26, 1938 .7220672 for @Zfarvuey Patented Aug. 8, 1939 PATENT OFFICE STOP DEVICE FOR MOVABLE PARTS ON ROTARY REPRINTING MACHINES Wilhehn Ritzerfeld, Berlin, Germany Application August 26, 1938, Serial No. 226,857 In Germany August 28, 1937 4 Claims.

The invention relates to a stop device for movable, preferably laterally shiftable parts on rotary reprinting machines and more especially for machines of this type working with mirrorscript, as for example moisteners, pressure rollers, supply table, carriers and so on. As well known rotary reprinting machines show the following fundamental construction: a pressure roller around which the original is put, a supply table on which the paper to be printed is laid and brought in contact with the original by hand, the movement of this table shifting this paper laterally, a moistener suitable to moisten the part of the paper on which reprinting is intended to take place, a counterpressure roller,

the pressure of which on the part to be reprinted effects such reprinting by bringing the corresponding parts of the original and the paper in intimate contact by movement of the counterpressure roller.

The essential of the invention consists in that the shiftable part is under the influence of a stop, which for example can be constructed out of one or more resilient bolts, balls or the like, which engage in suitably disposed racks in order thereby to secure the shiftable parts in the temporary place. More especially as security devices the following devices may be used: spring actuated ratchet pins, pins in connection with a spring actuated mounted ball, spring actuated latches or bolts.

The preferred form of construction uses at least two stops and is especially suitable for the supply table. This part must be secured against movement, because otherwise the lines would run obliquely. This would be an unbearable drawback in the case of reprinting bookkeeping cards and lines of the credit-side would cross lines of the debit-side.

The drawing illustrates by way of example two forms of construction made in accordance with the invention.

Fig. 1 is a front view and Fig. 2 a side view of an adjustable apparatus with only one stop bolt.

Figs. 3 and 4 illustrate in plan or in side view a construction, in which a supply table is provided with two stop bolts.

According to Figs. 1 and 2 the part a to be adjusted, which on the one hand can serve as a carrier for other parts, is shiftable on the rod 1). Parallel to the rod b runs a rail or the like 0, which in the present case is provided with orifices 02. In one of these orifices engages a stop bolt e controlled by the spring 1, for the purpose of securing the part a in its temporary position. The stop bolt e is disposed on the one hand in a holder 9 and on the other in a guide-piece h. On the holder g is disposed the handle 7c of angle-lever type rotatable at i.

In the construction according to Figs. 3 and 4 the supply table Z is movably disposed on rod n by means of the carrier m. are the stop pins running in guides p which are under the influence of the spring q. The pins 0 engage with their ends 0' in the orifices or recesses 'r of a rail 5. In the example shown in the drawing there are two stop pins 0 provided. One of them is in connection with the double lever u rotatable at t, which has a handle 11. The other is in connection with the double lever 10 rotatable at v.

The end 1!? of the lever it engages the end w of the lever w. Preferably the levers are constructed as rotatable angle levers.

If the table I is to be adjusted in one or other direction and secured, the lever u is rotated by means of its handle m in the direction of the arrow. On this the end 0 of the stop bolt 0 leaves its appropriate orifice. Simultaneously the end 11? presses against the end w of the lever w, so that also the bolt 0 appertaining to this lever is withdrawn. Now can be effected the adjustment of the table a and the bolting in another position.

Having now particularly described and ascer-' tained the nature of my said invention and in what manner the same is to be performed, I declare that what I claim is:

1. In a duplicating machine having a rotatable printing roller bearing copyable mirror-script original and at least one axially displaceable element for printing selected portions of said original onto clear sheets previously moistened with a readily volatilizing solvent, a rod for slidably supporting said displaceable element, and fixing means for fixing said axially displaceable element in a plurality of predetermined positions, said fixing means comprising a rail having a plurality of holes therein, a plurality of spring-held stop pins associated with said elements each adapted to engage one of said holes, and a manually operable lever mechanism for simultaneously withdrawing said pins from said holes.

2. In a duplicating machine having a rotatable printing roller bearing copyable mirror-script original and at least one axially displaceable element for printing selected portions of said original onto clear sheets previously moistened with a readily volatilizing solvent, and a rod for slidably supporting said displaceable element,

fixing means for fixing said axially displaceable elements in a plurality of predetermined positions, said fixing means comprising a rail havin a plurality of holes therein, a pair of spring-held stop pins slidably mounted in said displaceable element, each of said pins being adapted to engage one of said holes, a lever connected to each of said stop pins adapted to withdraw said pins when actuated, and manually operable elements for simultaneously actuating said levers.

3. In a duplicating machine having a rotatable printing roller bearing copyable mirror-script original and at least one axially displaceable element for printing selected portions of said original onto clear sheets previously moistened with a readily volatilizing solvent, a rod for slidably supporting said displaceable element, fixing means for fixing said axially displaceable element in a plurality of predetermined positions, said fixing means comprising a rail having a plurality of holes therein, a pair of spring-held stop pins slidably mounted in said displaceable element, each of said stop pins being adapted to engage one of said holes, a lever for each of said stop pins pivotally mounted in said displaceable element and capable of withdrawing said pins when actuated, a manually operable handle for actuating one of said levers, and means for causing actuation of the other of said levers upon actuation of the first one.

4. In a duplicating machine having a rotatable printing roller bearing copyable mirror-script original and at least one axially displaceable element for printing selected portions of said original onto clear sheets previously moistened with a readily volatilizing solvent, a rod for slidably supporting said displaceable element, fixing means for fixing said axially displaceable elements in a plurality of predetermined positions, said fixing means comprising a stationary rail having a plurality of holes therein, a pair of spring-held stop pins in said displaceable element each being adapted to engage one of said holes, a lever for each of said stop pins pivotally mounted in said displaceable element having one of their ends connected to said stop pin and having their other ends operatively associated to cause actuation of one of said levers when the other of said levers is actuated, and a manually operable handle for actuating one of said levers to cause simultaneous withdrawal of said stop pins from the holes of said rail.

WILHELM RITZERFELD. 

